/** 
 *  Copyright 2010 Matthew Werny & Burk Price.
 * 
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *  under the License.
 */
package net.iceflow.db.migration.maven;

import java.util.SortedSet;
import net.iceflow.db.migration.MigrationManager;
import org.apache.maven.plugin.MojoExecutionException;
import net.iceflow.db.migration.MigrationExecuter;

/**
 * Validate current schema against available migrations.
 * <p/>
 *
 * @goal validate
 */
public class ValidateMojo extends AbstractMigrationMojo {

	public void executeMojo() throws MojoExecutionException {
		getLog().info("Validating " + getUrl() + " using migrations at " + getMigrationsPath() + ".");

		try {
			MigrationManager manager = createMigrationManager();
			SortedSet<MigrationExecuter> pendingMigrations = manager.pendingMigrations();
			StringBuilder sb = new StringBuilder();
			sb.append("\n            Database: ").append(getUrl());
			sb.append("\n          Up-to-date: ").append(pendingMigrations.isEmpty());
			sb.append("\n  Pending Migrations: ");

			if (!pendingMigrations.isEmpty()) {
				boolean first = true;
				for (MigrationExecuter migration : pendingMigrations) {
					if (!first) {
						sb.append("\n                      ");
					}
					first = false;
					sb.append(migration.getFilename());
				}
			}

			getLog().info(sb.toString());
		} catch (Exception e) {
			throw new MojoExecutionException("Failed to validate " + getUrl(), e);
		}
	}
}
